Rotary valve for explosive-engines.



onnrcn MARK E. GHIVVIS, F MANTON, MICHIGAN, ASSIGNOR OF ONE-FOURTH TO FLOYD E. CADE AND ONE-FOURTH '10 CHARLES RANSOM, BOTH OF MANTON, MICHKGAN.

ROTARY VALVE FOR, EXPLOSIVE-ENGINES.

Specification of Letters Patent. Patented Sept, 1L2, Jl'lllllllii.

Application filed October 27, 1915. Serial No. 58,107.

To all whom it may concern:

Be it known that I, MARK E. Cnivvis, a citizen of the United States, residing at Manton, in the county of Wexford, State of Michigan, have invented certain new and useful Improvements in Rotary Valves for Explosive-Engines; and I do declare the following to be a full, clear, and exact description of the invention, such as wlll enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification. 4

This invention relates to valve mechanism for internal explosive engines and consists in the novel construction and arrangement of parts as hereinafter set forth and claimed.

The invention has for its object the pro ision of a valve of the rotary sleeve type for controlling the inlet and exhaust ports of a engine cylinder which shall be simple in construction and eflicient in operation, and wherein provision is made for containing the valve within the engine cylinder and for actuating it to effect the proper timing and registering of the ports with the movement of the piston by direct driving connection, with the engine shaft from within the crank-case of the engine, whereby the number of operative parts are reduced to a minimum and are also combined and housed in compact relation entirely within the casing of the engine.

A preferred form of embodiment of the novel'features of this invention by which the above object is effectively attained is illustrated in the accompanying drawings, in which,

Figure '1 is a central vertical sectional view through an engine cylinder and easinghaving my valve construction applied thereto. Fig. 2 is a transverse section through the cylinder and valve on dotted line 22 of Fig. 1. Fig. 3 is a fragmentary detail and an enlarged flanged base 4: at the lower end. This base, which forms the upper portion of the crank case is secured to an inwardly extending flange 5 formed on the upper edge of a concavo-convex base pan 6 by bolts as at 7.

Mounted concentrically within the cylinder 1, in spaced relation to the inner wall thereof, is a sleeve forming an inner cylinder 8, the upper end of which is provided with an outwardly extending flange 9 which 18 held rigidly seated in an annular recess 10 formed in the upper end of the cylinder .1 by means-of a water jacketed head 11.

cured by bolts 13 to the flange 3 of the cylinder 1 in contact with the flange 9 of the in-. nor cylinder and also has a centrally depending boss or hub 14: which fits tightly lnto and seals the upper end of said inner cylinder, forming therein a firing chamber into which a spark plug is adapted to extend through a threaded opening 15 formed centrally through said hub.

Inlet ports 16 and 17 are formed in registering alinement through the walls of the outer and inner cylinders 1 and 8, respectively, and exhaust or outlet ports 18 and 19 are also formed through said'cylinders, respectively, in registering alinement with each other and in suitable angular relation to said inlet ports, as shown in Fig. 2.

Interposed between the inner wall of the cessively with the inlet ports 16 and 17 and the outlet ports 18 and 19 as said valve sleeve is rotated. The lower end of this Valve sleeve extends into the base 4 of the crank case and is embraced by a frusto-conical beveled gear 25 which is fixedly attached thereto by means of bolts 26. The upper edge of this gear abuts against the lower end of the cylinder 1 and the lower edge is provided with a flange 27 which is rotatably supported upon the ledge 4 of the crank pan 6. Motion is imparted to rotate the valve sleeve through a pinion 28 mounted on the crank-shaft 22 in mesh with the gear 25. The ratio of this gearing is preferably four to one and the area of the valve ports to may be desired. I

hau stto the inlet ports of the cylinders may be such as will secure the proper timingin the registering of the ports to effect an early or ate opening and closing of said ports with the movement, of the piston as To insure close working joints around the ports 17 and 190i the inner cylinder 8, flexi ble two-piece packing rings 29 may he inserted in annular recesses formed in the outer face of said cylinder surrounding said ports so as to y'ieldably contact with the inner face of the valve sleeve, thus forming gas tight joints between said members.

It is obvious that minor changes may be made in the construction and general arrangement of the parts without departing from the essential features of the device, and the invention is presented as including all such modifications as properly come within the scope of the following claims.

I claim:

1. In an explosive engine, the combination with an outercylinder having ports therein and provided with a recess in its upper end, of a detachable head for said cylinder, an inner cylinder spaced concentric within the outer cylinder and having ports in registering alinement with the ports in said outer cyl1nder,-sa1d inner cylinder having a flange at its upper end seated and confined within said recess between said head and outer eyl1nder, a rotatable valve sleeve interposed between said outer and inner cylinders and having ports adapted to register with the ports o'tsaid cylinders,

said valve sleeve extending at its lower end 1nto the crank-case of said engine, and a 2. In an explosive engine, the comhination with an outer ported cylinder formed 'with a recess in its upper end and having a base provided with an inwardly projerting flange, of a detachable head for said cylinder, an inner cylinder spaced rmicentric within'the outer cylinder and having ports in registering alinement with the ports of said outer cylinder, said inner cylinder ha ving a flange at its upper end seated and con fined within said recess between said head and outer cylinder, a rotatable valve sleeve interposed between said outer and inner cylinders and having ports adapted to'regis ter with the ports of said cylinders, said sleeve extending at its lower end into the crank-case of said engine, and a driven gear embracing the end of said sleeve and rotatably supported onthe flange of said base in driving engagement with a pinion on thc crank-shaft of said engine.

In testimony whereof, I sign this specification.

MARK E. CHIVVIS. Witnesses CHARLEs RANsoM,

. FLOYD Cans. 

